Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham luc » cham soc, nhan luc, cham cuu
duy nang » dun nang, duy nong, duy sang
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
va danh » va dinh, va dan, va hanh
va cham » va chat, va tham
nang ma » tang ma, sang ma, nang cao
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (thu hoach)) duy nang ma hoi. lieu va cham luc va danh ((vai cua) OR (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thu hoach)) duy nang ma hoi. lieu va cham luc va danh ((vai cua) OR (lai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thu hoach)) duy nang ma hoi. lieu va cham luc va danh ((vai cua) OR (lai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thu hoach)) duy nang ma hoi. lieu va cham luc va danh ((vai cua) OR (lai cua)) tre*.